Darkroom (idea)

In the dim past, I worked in the printing industry, and spent much of my time in a pre-press darkroom.

One of the most curious things I discovered while looking up reference material (this was an old book even then), is that George Eastman, and Kodak, have copyrighted the word darkroom, as well as terms describing the materials, and processes involved both in general photography, and the photographic process as it relates to offset printing.